化学学报 ›› 2012, Vol. 70 ›› Issue (08): 1001-1007.DOI: 10.6023/A1111092 上一篇    下一篇

研究论文

均三嗪衍生物应用于Fe3+和Cu2+的选择性识别研究

张华, 刘爱红, 吴芳英   

  1. 南昌大学化学系 南昌 330031
  • 收稿日期:2011-11-09 修回日期:2011-12-27 出版日期:2012-04-28 发布日期:2012-02-14
  • 通讯作者: 吴芳英
  • 基金资助:

    国家自然科学基金(No. 20965006)资助项目.

Synthesis of s-Triazine Derivatives and Using as Colorimetric Probe for Selective Recognizing of Fe3+ and Cu2+

Zhang Hua, Liu Aihong, Wu Fangying   

  1. Department of Chemistry, Nanchang University, Nanchang 330031
  • Received:2011-11-09 Revised:2011-12-27 Online:2012-04-28 Published:2012-02-14
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 20965006).

合成了2,4-二甲基-6-(4'-N,N-二甲氨基苯乙烯基)-1,3,5-均三嗪(1)和2-苯乙烯基-4,6-二甲基-1,3,5-均三嗪(2)两种化合物, 并对其进行了1H NMR, MS, 元素分析等表征. 采用吸收光谱法研究了金属离子与化合物间的相互作用, 结果显示: 化合物1 对Fe3+和Cu2+表现出高选择性光谱响应, 其最大吸收波长由393 nm 分别红移至525 nm 和513 nm, 溶液颜色由黄色变为粉红色. 化合物1 与Fe3+结合形成1∶1 型配合物, 其结合常数为1.8×104 L·mol-1; 与Cu2+结合形成2∶1 型配合物, 其结合常数为2.6×1010 L·mol-1. 化合物2 仅对Fe3+呈现显著的光谱变化, 其最大吸收波长由304nm 红移至357 nm, 而Cu2+的加入未引起光谱明显变化, 2 与Fe3+亦形成1∶1 型配合物, 结合常数为1.0×105 L·mol-1.结果表明Fe3+可能与化合物1 和2 中三嗪N 配位, 而Cu2+与化合物1 中甲氨基中的N 配位. 同时考察了其它金属离子如Li+, K+, Mg2+, Ca2+, Co3+, Ni2+, Ag+, Cd2+, Hg2+和Zn2+等离子对化合物1 和2 吸收光谱的影响, 结果显示两者光谱均无明显变化, 据此提出了高选择性Fe3+, Cu2+的识别体系.

关键词: 均三嗪苯乙烯衍生物, 比色分析, Fe3+, Cu2+

In this paper, two compounds of s-triazine derivatives which named 2,4-dimethyl-6-[(4'-N,N-dimethylamino) phenylethenyl]-1,3,5-s-triazine (1) and 2-styryl-4,6-dimethyl-1,3,5-triazine (2) were synthesized and characterized by 1H NMR, MS and elemental analysis. The interactions between the metal ions and compounds 1~3 were investigated by UV-vis spectroscopy. Results indicated that the absorption spectrum of compound 1 had a remarkable change when it combined with Fe3+ and Cu2+, and the maximum absorption peaks shifted from 393 nm to 525 nm and 513 nm, respectively. The models of compound 1 intergraded with Fe3+ and Cu2+ were 1∶1 and 2∶1, respectively, but with the same remarkable color change from yellow to pink by naked-eye colorimetric detection. The association constants of 1-Fe3+ and 1-Cu2+ were 1.8×104 L·mol-1 and 2.6×1010 L·mol-1 respectively. Meanwhile, the spectrum of compound 2 underwent distinct change when it combined with Fe3+ and the maximum absorption peak shifted from 304 nm to 357 nm. But less change was observed when it intergraded with Cu2+. The ratio of compound 2 intergraded with Fe3+ was 1∶1 and the association constants was 1.0×105 L·mol-1. Therefore, we could concluded that Fe3+ combined with the ring of triazine of the compounds 1 and 2, but the Cu2+ intergraded with N atom of the methylamino of the compound 1. At the same time, the interactions of compounds 1 and 2 with other ions such as Li+, K+, Mg2+, Ca2+, Co3+, Ni2+, Ag+, Cd2+, Hg2+and Zn2+ were also investi gated, but obvious absorption spectral changes was not observed. Thus a new kind chemosensor for Fe3+ and Cu2+with high selectivity and sensitivity was introduced.

Key words: s-triazine derivatives, colorimetric assay, Fe3+, Cu2+